<script>

import { createApp } from 'vue'

const app = createApp({
  /* 根组件选项 */
})

// 从一个单文件组件中导入根组件
import App from './App.vue'

</script>

const app = createApp(App)

<div id="app">
    <button @click="count++">{{ count }}</button>
</div>
